Adj Flange/Base Flange, 1 1/4 in For Pipe Size, Structural Pipe Fitting - 54WK01|46ADJ-7 - Grainger
1/2" Floor Flange, Home TZH Malleable iron Pipe Fittings for Industrial vintage style, Flanges with Threaded Hole for DIY Project/Furniture/Shelving Decoration (10 Pack) - Amazon.com
Southland 1 in. Black Malleable Iron Threaded Floor Flange 521-605HN - The Home Depot